Improvement in rock-drills



thviTEn STATES JOSEPH E. NESEN, OF NEV YORK, N.

PATENT OEEicE.

HMPROVEMENT IN ROCK-DRILLS.

Specification forming part of Letters Patent No. 18,763, dated December 1, 1857.

T0 all whom, it may concern:

eitknown that I, JOSEPH E. NEsEN, of the city, county, and State of NewYork, have inl vented a new and Improved Rock-Drill; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making apart of this specification, in which- Figure l is a front view of my improvement. Fig. 2 is a longitudinal central section of the same.

Similar letters of reference indicate corre spondin g parts in the two figures.

This invention consists in a novel way of mounting the drill, whereby the same may be adjusted and operated in different positions according to the desired direction or position of the plane in which the hole is to be drilled.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents a rectangular frame in which a traverse bar B isplaced, said bar being fitted looselybetween guides a ce in the framing. To each end of the bar B a wheel O is attached, and to each side of the frame A a lever D is secured, as shown at Z). By raising the outer ends of the levers D and securing them in an elevated state, the frame A will rest upon the bar B, which is the axle of the wheels C, and the frame A will consequently be mounted on said wheels. By allowing the outer ends of said levers to descend, the bottom of the frame A will rest upon the ground. The frame A may be constructed of either wood or metal and in any proper way.

To the frame A there are secured two uprights c c, the upper ends of which are connected by a cross-tie D.

E represents a rectangular frame, which is secured to the cross-tie D by means of a rod F, which passes through the centers of the traverse pieces (l CZ of said frame and longitudinally through the cross-tie D, as shown clearly in Fig. The frame E is composed simply of two side pieces c e, connected by the traverse pieces d d, and said frame may be adjusted either horizontally or be inclined either to the right or lett, the rod F being its axis, the frame being allowed to be turned by relaxing a nut f at one end of the rod F,

and secured at any desired point by screwing `up the nut.

G represents a shaft which is placed longitudinally on the frame E. This shaft has a crank-wheel H attached to one end of it and a bevel-wheel I at the opposite end. The l wheel I gears into a corresponding wheel J on a shaft K placed transversely in the frame E. The shaft K has a tappet or wiper L upon it.

To the end of the frame E and concentric with the shaft K there are attached two semicircular plates M M, and on the shaft K there are placed loosely two arms g g, the outer ends of which are attached to a rectangular metal frame N, said frame being at right angles with the arms g g. Each side of the frame N has a bolt h attached, and these bolts pass through curved slots t' in the plates M M. The frame N may be moved so as to be at any angle relatively with the frame E between a horizontal and vertical position, and it may be secured at any desired point by screwing up the bolts 7L.

O represents a drill-rod which passes longitudinally through the frame N and is allowed to slide loosely in it. O n the rod O and within the frame N a collar or boss P is placed loosely, said collar or boss being attached to the rod by means of a screw or pin j, the inner end of which iits in a longitudinal groove 7,; in the rod. The rod is allowed to slide in the collar or boss, but is not allowed to turn within it. To the lower end of the collar or boss P a ratchet-wheel Q is attached, into which two oblique or inclined pawls R R catch, said pawls being attached one to each side of the frame and made to bear against the ratchet by springs Z Z, one to each pawl. (See Fig. l.) To the upper end of the collar or boss P there are pivoted two levers S S. These levers are each provided with a jaw m, the face of which is of concave form corresponding to the cylindrical form of the rod O. In the upper part of the frame E there is secured a hollow cylinder U. The upper part u of this cylinder has its sides parallel with the rod O, but the lower part o is of conical form. The upper ends of the levers S S work or pass within the cylinder U. Aspiral spring V is placed on the rod O, the upper end of said spring bearing against a plate W, which is fitted in the frame Naud on guide-rods p p, said plate having screws q q bearing against it, by adjusting which the strength of spring V may be graduated as desired. The lower end of the spring rests or bears upon or against the jaws m m. X is a drill, which is tted in the lower end of the rod O.

The operation is as follows: The implement is moved to the desired spot by raising the outer ends of the levers D D, and thereby causing the frame A to rest uponthe axle B, so that the implement may be readily shoved or rolled along. Vhen the implement is at the proper place, the levers D are allowed to descend, and the frame A then rests firmly on the ground. The drill-rod O is then adj listed in such a position that the desired hole may be drilled in the proper direction. This adjustment of the rod is eected by loosening the bolts 71, and elevating or depressing the drill in a plane longitudinally with the frame A, and also by loosening the nut f, so that the drill may be moved in a lateral or transverse plane. These two movements combined give a universal movement to the drill and allow it to be adjusted at any desired angle between a horizontal and vertical position, so that it will drill a hole in any desired direction. Vhen the drill is adj usted, the shaft G is rotated by applying power to the wheel H, and the tappet or Wiper L acts against the ratchet Q and raises the collar or boss P and levers S S, and as the upper or outer ends of said levers pass within the part o?, of cylinder Uthe jaws m are forced against the rod O, and consequently raise said rod and ot' course the drill X. Then the ends or arms of the tappet or wiper pass or leave the ratchet, the rod and drill are driven downward by the force of the springV, and when the upper ends of the levers S S leave thc cylindrical part n of the cylinder and reach the' conical part o the rod is relieved from the jaws m and the rod strikes the rock, the jaws m being expanded or the pressure removed from them j ust previous to the striking of the drill against the rock.l By this means the recoil of the drill and rod is not allowed to act upon the other working parts of the machine, and consequently said parts are not subjected to any unnecessary wear and tear. The rod and drill are rotated or turned a certain portion of arevolution at each upward movement Yort' the rod in consequence of the action of the oblique or inclined pawls against the ratchet Q.

I am aware that rock-drills have been previously mounted so as to be capable of being adjusted in one direction only-viz., in a vertical plane longitudinal With the frame on which they are placed; and I am also aware that means similar to that herein described has been employed for effecting the purpose. The ratchet Q and pawls R R have also been used. I therefore do not claim the ratchet Q and pawls R R. Nor do I claim the slotted semicircular plates M M and their connection with the frame N, as herein shown, when separately considered. Nor do I claim the wiper or tappet L; but,

I-Iaving thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

Attaching the semicircular slotted plates M M and frame N to the adjustable frame E. fitted tothe uprights c o of the frame A, substautially shown, and for the purpose set forth.

J. E. NESEN.

Witnesses:

W. TUscH, W. HAUFF. 

